[PATCH 5/5] xfs_scrub: check summary counters

Darrick J. Wong
2019-09-06T03:34:33Z

From: Darrick J. Wong <darrick.wong@oracle.com>

Teach scrub to ask the kernel to check and repair summary counters
during phase 7.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
scrub/phase4.c | 12 ++++++++++++
scrub/phase7.c | 14 ++++++++++++++
scrub/repair.c | 3 +++
scrub/scrub.c | 12 ++++++++++++
scrub/scrub.h | 2 ++
5 files changed, 43 insertions(+)

diff --git a/scrub/phase4.c b/scrub/phase4.c
index 589777f6..25fedc83 100644
--- a/scrub/phase4.c
+++ b/scrub/phase4.c
@@ -107,6 +107,18 @@ bool
xfs_repair_fs(
struct scrub_ctx *ctx)
{
+ bool moveon;
+
+ /*
+ * Check the summary counters early. Normally we do this during phase
+ * seven, but some of the cross-referencing requires fairly-accurate
+ * counters, so counter repairs have to be put on the list now so that
+ * they get fixed before we stop retrying unfixed metadata repairs.
+ */
+ moveon = xfs_scrub_fs_summary(ctx, &ctx->action_lists[0]);
+ if (!moveon)
+ return false;
+
return xfs_process_action_items(ctx);
}

diff --git a/scrub/phase7.c b/scrub/phase7.c
index f82b60d6..308b8bb3 100644
--- a/scrub/phase7.c
+++ b/scrub/phase7.c
@@ -9,10 +9,13 @@
#include <sys/statvfs.h>
#include "libfrog/paths.h"
#include "libfrog/ptvar.h"
+#include "list.h"
#include "xfs_scrub.h"
#include "common.h"
+#include "scrub.h"
#include "fscounters.h"
#include "spacemap.h"
+#include "repair.h"

/* Phase 7: Check summary counters. */

@@ -91,6 +94,7 @@ xfs_scan_summary(
struct scrub_ctx *ctx)
{
struct summary_counts totalcount = {0};
+ struct xfs_action_list alist;
struct ptvar *ptvar;
unsigned long long used_data;
unsigned long long used_rt;
@@ -110,6 +114,16 @@ xfs_scan_summary(
int ip;
int error;

+ /* Check and fix the fs summary counters. */
+ xfs_action_list_init(&alist);
+ moveon = xfs_scrub_fs_summary(ctx, &alist);
+ if (!moveon)
+ return false;
+ moveon = xfs_action_list_process(ctx, ctx->mnt.fd, &alist,
+ ALP_COMPLAIN_IF_UNFIXED | ALP_NOPROGRESS);
+ if (!moveon)
+ return moveon;
+
/* Flush everything out to disk before we start counting. */
error = syncfs(ctx->mnt.fd);
if (error) {
diff --git a/scrub/repair.c b/scrub/repair.c
index 0e5afb20..04a9dccf 100644
--- a/scrub/repair.c
+++ b/scrub/repair.c
@@ -84,6 +84,9 @@ xfs_action_item_priority(
case XFS_SCRUB_TYPE_GQUOTA:
case XFS_SCRUB_TYPE_PQUOTA:
return PRIO(aitem, XFS_SCRUB_TYPE_UQUOTA);
+ case XFS_SCRUB_TYPE_FSCOUNTERS:
+ /* This should always go after AG headers no matter what. */
+ return PRIO(aitem, INT_MAX);
}
abort();
}
diff --git a/scrub/scrub.c b/scrub/scrub.c
index b1927f38..0e30bb2f 100644
--- a/scrub/scrub.c
+++ b/scrub/scrub.c
@@ -384,6 +384,18 @@ xfs_scrub_fs_metadata(
return xfs_scrub_meta_type(ctx, XFROG_SCRUB_TYPE_FS, 0, alist);
}

+/* Scrub FS summary metadata. */
+bool
+xfs_scrub_fs_summary(
+ struct scrub_ctx *ctx,
+ struct xfs_action_list *alist)
+{
+ int ret;
+
+ ret = xfs_scrub_meta(ctx, XFS_SCRUB_TYPE_FSCOUNTERS, 0, alist);
+ return ret == 0;
+}
+
/* How many items do we have to check? */
unsigned int
xfs_scrub_estimate_ag_work(
diff --git a/scrub/scrub.h b/scrub/scrub.h
index 7e28b522..d407abb0 100644
--- a/scrub/scrub.h
+++ b/scrub/scrub.h
@@ -25,6 +25,8 @@ bool xfs_scrub_ag_metadata(struct scrub_ctx *ctx, xfs_agnumber_t agno,
struct xfs_action_list *alist);
bool xfs_scrub_fs_metadata(struct scrub_ctx *ctx,
struct xfs_action_list *alist);
+bool xfs_scrub_fs_summary(struct scrub_ctx *ctx,
+ struct xfs_action_list *alist);

bool xfs_can_scrub_fs_metadata(struct scrub_ctx *ctx);
bool xfs_can_scrub_inode(struct scrub_ctx *ctx);